We use cookies to deliver essential features and to measure their performance. Learn more.
Keep TheSkyLive Ad-Free! Donate Now!
public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:12 
Transit: 13:06 
Sunset: 20:59
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations » Cygnus » 

HR7551

Above the horizon.  Rise: 14:59 | Tran: 0:40 | Set: 10:26
Alt: 55.74°   Az: 105.68°   Direction: East-South-East

HR7551 is a variable hypergiant star of spectral class B0 in the constellation of Cygnus.

HR7551 visual magnitude is 6.44. Because of its faintness, HR7551 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of HR7551 star
DSS2 image of HR7551. The red arrow shows the motion of HR7551 during the next 100000 years (11.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Celestial Coordinates

Apparent

19h 49m 46s
+33° 29’ 59”
21h 17m 51s
17h 07m 38s

J2000

19h 48m 50s
+33° 26’ 13”

Galactic Coordinates

68.81°
3.85°

Finder Chart

Finder chart HR7551 star
Simplified finder chart for HR7551.

Magnitude, Color, Spectral Class

6.44
Hypergiant

-2.72
B0I
8163K

The red dot in the diagram below shows where HR7551 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7551. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR7551 is distant 2,217.69 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

680.27
2,217.69
-10 km/s
0.007 arcsec/y
-0.002"/y

Alternative Designations

SAO68895
SAO68895

Visibility from Your Location

Today's HR7551 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.5°
Max altitude: 72.0°
Azimuth: 303.5°